Broaching-machine



F. I. LAPOINTE. BBOACHING MACHINE.

APPLlCATlON FYILED OCT-29,1919.

Patented May3,1921.

6 SHEETS-SHEET 1.

F. J. LAPOINTE.

BROACHING MACHINE.

APPLICATION FILED OCT 29, I919- Patented May 3, 1921.

6 SHEETS-SHEET 2.

fiwentar:

V Jlily.

F. J.- LAPOINTE.

BROACHING MACHINE.

APPLICATION FILED 0U. 29, 1919.

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Fr]. LAPOINTE.

BROACHING MACHINE.

APPLICATION FILED OCT. 29, 1919.

1,376,708. 7 Patented May 3; 1921.

6 SHEETS-SHEET 4.

lhvenior: lhmals Jljapoinie,

F. J. LAPOINTE.

BROACHING MACHINE.

APPLICATION FILED ocnxza. 1919.

1,876,708. Patented Ma 3,1921.

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6 SHEETS-SHEET 55-- liweni'or:

Francis JlIapozhde, v

F. J. LAPOINTE.

BROACHING MACHINE.

APPLICATION FILED OCT. 29, 1919.

Patented May 3, 1921.

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I 1% a w M1 0 6 7 .machine embodying the principles of the yUNlTEl) STA FRANCIS J. LAPOINTE, OF ANN ARBOR, MICHIGAN.

BROACHING-MACHINE.

Specification of Letters Patent.

1 Application filed October 29, 1919. Serial No. 335,978.

To all whom it'c'nay concern.

Be it known that I, FRANCIS J. LAPOINTE, a citizen of the United States of America,

' and a resident of Ann Arbor, in the county of Washtenaw and State of Michigan, have invented certain new and useful Improvements in Broaching-Machines, of which the following is a speclfication.

r This invention relates to broaching machines and particularly to that class of broaching machines in which the operating tool is adapted to be reciprocated vertically.

The object of the invention is primarily to provide a machine in which the tool ma be either pushed or pulled through the worl i as may be desired.

Another object of the invention is to simplify the construction of such machines and provide a broaching machine whichwill be effective in operation While occupying very little floor space.

A further object of the invention is to provide a simple and effective mechanism for eversing the direction of movement of the tool carrier at the end of its movement in either direction.

The invention consists in certain novel features of construction and arrangement of parts which will be readily understood by reference to the. description of the drawings and to the claims to be hereinafter given.

For the purpose of illustrating the invention one preferred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described except as required by the scope of the appended claims.

.Of the drawings:

Figure 1 represents a front elevation of a present invention.

Fig. 2 represents a side elevation of the same.

' horizontal table 18 Fig. 3 represents a vertical section on line 3, 3, on Fig. 1, drawn to an enlarged scale. ig. 4 represents a vertical section on line 4, 4, on Fig. 1, drawn to an enlarged scale.

Fig. 5 represents a similar view with the work support in reverse position.

Fig. 6 represents a transverse vertical section on line 6, 6, on Fig. 3, and

Fig. 7 represents a detail of the driving out and means for rotating it.

Similar characters indicate like parts throughout the several figures of the drawings.

In the drawings, 10 is the base for a iramework 11 extending upwardly thererom.

The front face ofthe framework 11 is provided with a plurality of cylindrical openings 12, 13 and 14'extending transversely thereof. Eitherof these openings 12, 13 or 14 is adapted to receive a headed bolt 15, the rear end of which is threaded and has mounted thereon a lockingnut 16. I

This bolt 15 is adapted to extend through the back plate of the bracket 17 having a in which a work-supporting member 19 of any usual construction is adapted to be positioned. The front face of the framework 11 is also provided with a plurality of smaller threaded holes 20, 21, 22 and 23. Either of these threaded holes 20, 21, 22 or 23 is adapted to receive a locking bolt 24 extending through the lower end of the bracket'17.

As shown in Fig. 5 of the drawlngs, the bracket 17 is in its lowest position with the bolt 24 disposed-in the threaded hole 23.

In this position'of the bracket v17, the work 25 isadapted to be operated upon by a broaching tool 26 while said broaching tool is being pushed downwardly therethrough.

With the bracket 17 mounted upon the bolt 15 and with the said bolt 15 disposed in the hole 14, the locking bolt 24 may be removed from the threaded hole 23 and the entire bracket-17 rotated about the axis of the bolt 15 through an angle of 180 and then the locking bolt 24 may be positioned Patented May 3, 1921.

. by removing the locking bolt 24 from the threaded hole 23 and the bolt 15 from the cylindrical'opening 14, moving the bracket upwardly and inserting the bolt 15 in either of the cylindrical openings 12 or Band I the locking bolt 24 in either the threaded hole 21 or the threaded hole 22 according to which opening 12 or 13 the bolt 15 has been inserted into.

- The base 10 is provided with an upwardly extending flange 28 forming a receptacle in which the chips and oil drippings may be collected as the work 25 is operated upon by the broaching tool 26 or 27.

At the upper end of the framework 11 are two forwardly extending parts 29 and 30 in which are mounted alined vertical bushings 31 and 32.

'The lower bushing 32 forms a bearing for a non-revoluble tool-supporting screw 33,

while the upper bushing 31 forms a bearing for a revoluble sleeve 34 to the lower end of which is secured a bevel gear 35 which is adapted to be driven by a bevel pinion 36 mounted upon the revoluble shaft 37. End movement of the revoluble member 34 is prevented by a collar 38 threaded to the upper end thereof, said collar being locked from rotation by a set screw 39.

Interposed between the lower face of the part 29 and the gear 35 is an anti-friction thrust bearing of any usual construction.

Another anti-friction thrust bearing 41, of usual construction, is mounted upon the part 30 and surrounds the bushing 32. This bushing 32 is provided with a key 42 extending into a longitudinal slot in the screw 33 whereby said screw is prevented from rotating, said bushing being fixedly secured to the part 30 by means of bolts 43 extending through a flange 44 on said bushing.

The lower end of the revoluble member 34 has two diametrically disposed depressions 45 therein adapted to receive projections 45 extending upwardly from the two parts of a divided nut 46. The lower end of this divided nut 46 has an annular flange 47 resting uponthe anti-friction thrust bearing 41 and is surrounded by a ring 48 preventing the two parts of the nut 46 from separating.

Near the upper end of the dividedlnut 46 is a flange 49 upon which rests a ring 50 adapted to retain the two parts of the nut 46 in contact when in position to coact with the non-revoluble screw 33.

.The inner diameter of the ring 50 is the same as the outer diameter of the revoluble member 34 so that the ring 50 may be moved upwardly about the revoluble member 34 when it is desired to remove the nut 46 from the screw 33.

In like manner the inner diameter of the ring 48 is greater than the outer diameter of the ring 50 so that this ring 48 may be readily removed when it is desired to remove the nut 46 from the screw 33.

The bushing 31 is prevented fromrotating by means of the set screw 51 and interposed between the upper end of said bushing 31 and the collar 38 is a washer 52.

The lower end of the screw 33 is provided with a threaded opening 53 in which may be secured the shank of a broaching tool or the shank of a broaching tool holder so constructed that said tool may be adjusted perpendicularly to the axis of the screw 33.

As the broaching tool to be used on the machine or the means of mounting the tool upon the machine, form no part of the pres ent invention, it is believed that it is unnecessary to illustrate the same in this application.

The shaft 37 is mounted in a suitable bearing 54 in the upper end of the framework 11 and has secured to its rear end a bevel gear 55 with which meshes the two bevel pinions 56 and 57, each mounted upon and revoluble witha clutch member 58 or 59.. V

These clutch members 58 and 59 are secured to and rotate with the revoluble sleeves 60 and 61 surrounding the driving shaft 62 which has a driving pulley 63 secured to one end thereof.

The revoluble sleeves 60 and 61 have end flanges 64 to prevent end movement thereof in one direction while the gears 56 and 57 are secured thereto by means of screws 65 with the inner ends of said gears contacting with the bearings 66 for said sleeves 60 and 61 thereby preventing end movement in the opposite direction.

The shaft 62 has pinned thereto collars 67 abutting the outer ends of the mvoluble sleeves 60 and 61 thus preventing end move- -ment of said shaft 62 while permitting it to freely rotate.

Interposed'between the inner ends of the clutch members 58 and 59 and surrounding the shaft 62, is a slidable clutch member 68.

This clutch member 68 is keyed to the shaft 62 so as to rotate therewith while adapted to be moved-endwise relatively to said shaft 62 so that the locking lugs 69 on the ends thereof may be engaged with the locking lugs 70 on either of the clutch members 58 or 59 as desired.

' be moved relatively tothe shaft 62 to lock By moving the lever 84 about the pivot 83 the clutch member 68 in engagement with either the clutch member 58 or the clutch member 59 as the case may be.

WVhen the various instrument alities are in the position indicated in Fig. 6 of the drawings, the rotation of the shaft 62 will impart no movement to the shaft 37 but as soon as the rod 71 is moved to the right of Fig. 6 of the drawings and the slidable member 68 is locked to the clutch member 59, rotary movement will be imparted to the shaft 37 through the pinion 57 and gear 55.

When the rod 71 is moved to the left of Fig. 6 to lock the slidable clutch member 68 to the clutch member 58, rotary movement in a reverse direction will be imparted to the shaft 37 by means of the pinion 56 and gear 55.

The outer end of the slidable shipper rod 71 is pivotally connected to the arm 74 secured to the rocker shaft 75 mounted in bearings in the ears 7 6 rojecting outwardly from the upper end of the framework 11; The opposite end of the roller shaft 75 is provided with an arm 77 pivotally connected to the vertical rod 78 mounted in bearings in ears 79 extending outwardly from the upper end of the framework 11.

On the rod 78 are mounted two adjustable stop members 80 and 81, these members being in the path of movement of an arm 82 extending outwardly from the upper end of the screw 33. v

Pivoted at 83 is an operating lever 84 pivotally connected at 85 to the vertical rod 78.

the rod 78 will be moved endwise and in its movement oscillate the rocker shaft75 sufficiently to move the shipper rod 71 endwise and bring the slidable clutch member 68 into locking engagement with one of the clutch members 58 or 59.

This having been accomplished, the rotarymovement of the driving shaft 62 will be imparted to the shaft 37 and then through the gears 36 and 35 and revoluble sleeve 34 to the nut 46. I

As the nut 46 rotates, the screw 33 will be reciprocated in its bearings 34 and 32.

As soon as the arm 82 comes into contact with one of the stop members 80 or 81, the rod 78 will be moved sufliciently to return the rocker shaft 75 to its normal position and the slidable clutch member 68 will be disengaged from either clutch member 58 or 59 and the machine will be stopped ready for another operation.

v The parts 29 and 30 are connected together by side plates 83 which form a closed chamber 84 for the nut and various operating mechanisms, said chamber being closed by means of a plate 85 secured to the framework 11 by screws 86 thus keeping the operating mechanisms free from dirt.

In a similar manner the chamber 87 in which the driving gears and clutch mechanisms are mounted is closed byimeans of a plate 88:

The work-support 19 is retained in the plate 18 by means of the set screw 19 as shown in Figs. 4 and 5 of the drawings.

The chambers 84 and 87 are partially filled with oil which thoroughly lubricates the operating parts of the machine rotating within said chambers.

The machine occupies but little floor space and its parts are reduced to a minimum.

y reversing the position of the bracket 17, the machine is adapted for use with either a pushing broaching tool or one which is pulled through the work.

y providing means whereby this bracket 17 may be raised and lowered for different classes of work, various lengths of tools may be used.

This is of some importance as the broaching tools are expensive and the longer they are the greater the cost thereof.

If a long tool becomes .broken it means considerable loss and consequently it is desirable to use short tools when the work may be performed therewith as when one of these shorter tools becomes broken there is not such an outlay to replace it.

It is believed that the operation and many advantages of the invention will be fully apparent without further description.

Having thus described my invention, I claim 1. In a machine of the class described, a. framework provided with a cylindrical opening therethrough and threaded holes on opposite sides of said opening at equal distance therefrom; a work-supportin bracket; a headed bolt extending through said bracket and said cylindrical opening; a nut therefor; and a screw extending through said bracket and adapted to coact with either of said threaded holes.

2. In a machine of the class described, in combination with a broaching tool; a framework; a work-supporting bracket; an annular bushing secured in said bracket for the reception of said broaching tool; and means for locking said bracket to said framework in different positions thereon.

3. In a machine of the class described, in combination with a broaching tool; a vertical framework; a work-supporting bracket pivotally mounted thereon and having a lateral projection provided with an opening therethrough perpendicular to the pivot of said bracket and adapted to receive said broaching tool; and means carried by sa1d bracket and coacting with said framework for locking said bracket in different positions thereon.

4. In a machine of the class described, in combination with a broaching tool; a framework; a work-supporting bracket thereon and having a lateral projection provided with an openingtherethrough; an annular bushing in said opening adapted to receive said broaching tool; and means for adjusting said bracket relativelyto.said framework and looking it in adjusted position whereby it is adapted for use in connection witlh either a pushing or pulling broaching too 5. In a machine of the class described, a framework having two non-revoluble alined bearings; a revoluble tubular member in one bearing; a non-revoluble tool-supporting screw in the other bearing, means in said other bearing preventing rotation of said screw; means for rotating said tubular member; and a nut for said screw adapted to be rotated by said tubular member.

6. In a machine of the class described, a framework having two non-revoluble alined bearings; a revoluble tubular member in one bearing having a depression in one end; a non-revoluble tool-supporting screw in the other bearing; means. for rotating said tubular member; and a nut for said screw provided with a lug positioned in said'depres- Sion and adapted to be rotated by said tubular member. 7. In a machine of the class described, a framework having non-revoluble alined bearings; a revoluble tubular member, in one bearing having two oppositely disposed depressions inoneend; a non-revoluble toolsupporting screw adapted to reciprocate in said tubular member and other bearing and a divided nut having projections positioned In said depressions.

8. In a machine of the class described, a framework having non-revoluble alined bearings; a revoluble tubular member in one bearing having two oppositely disposed depressions in one end; a non-revoluble toolsupporting screw adapted to reciprocate in said tubular member; a divided nut having projections positioned in said depressions; and annular members surrounding the two parts of said nut.

9. In a, machine of the class described, a framework having non-revoluble alined bearings; a revoluble tubular member in one of said bearings; a nut having driving connections with said tubular member; a toolsupporting screw in said nut adapted to reciprocate in said tubular member and having a groove extending lengthwise thereof; and a key in the other bearing extending into said groove.

10. In a machine of the class described, a framework having non-revoluble alined bearings; a revoluble tubular member in one of saidbearings; a nut independent of but having direct driving connections with said tubular member; a non-revoluble tool-sup porting screw in said nut adapted to reciprocate in said tubular member; means preventing the rotation of said screw; and antifriction bearings to take the end thrust of said screw in either direction.

11. In a machine of the class described, a framework having non revoluble alined bearings; a revoluble tubular member in one of said bearings; a nut independent of but having direct driving connections with said tubular member; a non-revoluble tool-supporting screw in .said nut adapted to reciprocate in said tubular member; a gear secured to said tubular member; and means for rotating said gear ineither direction.

12. In a machine of the class described, a framework having nonrevoluble alined bearings; a revoluble tubular member in one of said bearings; a nut independent'of but having direct driving connections with said tubular member; a non-revoluble tool-supv porting screw in said nut adapted to reciprocate in said tubular member; a gear secured to said tubular member; means for notating said gear in either direction; and means for discontinuing the rotation of said gear when said screw has moved a predetermined distance.

13. In a machine of the class described, a framework having non-revoluble alined bearings; a revoluble tubular member in one of said bearings, a divided nut independent of but having direct driving connections with said tubular member; and adapted to be detached therefrom; a tool-supporting screw in said nut adapted to reciprocate in said tubular member; means preventing the rotation of said screw; a bevel gear secured to said tubular member; a bevel pinion meshing therewith; a driving shaft for said pinion; and means for imparting rotary movement to said shaft in either direction for a predetermined time.

14. In a machine of the class described, a revoluble nut; a non-revoluble screw therein; a bevel gear for rotatin said nut;

a pinion meshing therewith; a siaft there-.

either of said loosely mounted clutch members.

15. In a machine of the class described, a revoluble nut; a non-revoluble screw therein; a bevel gear for rotating said nut; a pinion meshing therewith; a shaft therefor radial to the axis of said bevel. gear; a bevel driving gear thereon; a driving shaft; a driving pulley secured thereto and adapted to rotate said shaft; a slidable clutch member on said driving shaft; clutch members loosely mounted on and rotatable independently of said driving shaft and adapted to be engaged by said slidable clutch member; a bevel pinion on each of said loosely mounted clutch members meshing with said driving gear; means for moving said slidable clutch member into engagement with either of said loosely mounted. clutch members; and mechanism actuated by the movement of said non-revoluble screw for controlling the operation of said clutch moving means.

16. In a machine of the class described, a revoluble nut; a non-revoluble screw therein: a bevel driving gear; driving connections between said gear and nut; a driving shaft; a framework; alined headed sleeves revoluble in bearings in said framework and in which said shaft is adapted to rotate; clutch members secured to the inner ends of said sleeves: bevel pinions mounted on said clutch members and meshing with said driving gear; a slidable member on said shaft provided with projections on each end adapted to engage said clutch members; and means for moving said slidable member endwise.

17. In a machine of the class described, a revoluble nut; a non-revoluble screw therein; a bevel driving gear; driving connections between said gear and nut; a driving shaft; a framework; alined headed sleeves revoluble in bearings in said framework and in which said shaft is adapted to rotate; clutch members secured to the inner ends of said sleeves; bevel pinions mounted on said clutch members and meshing with said driving gear a slidable member on said shaft provided with projections on each end adapted to engage said clutch members; collars secured to said shaft adjacent the outer headed ends of said sleeves; and means for moving said slidable member endwise.

18. In a machine of the class described, a revoluble nut; a non-revoluble screw therein a driving shaft; driving connections between said shaft and nut for rotating the nut in either direction including a slidable clutch member on said shaft; a shipper rod; means thereon for moving the slidable clutch member endwise; a lever pivotally connected to said rod; a rocker shaft to which said lever is secured; an arm on said rocker shaft perpendicular to said lever; a reciprocable bar to which said arm is pivotally connected; stop members adjustable on said bar; and an arm on said non-revoluble screw in the path of said stop members and adapted to coact therewith to stop the operation of the machine at a predetermined time.

19. In a machine of the class described, a revoluble nut; a non-revoluble screw therein; a driving shaft; driving connections between said shaft and nut for rotating the nut in either direction including a slidable clutch member on said shaft; a shipper rod;

means thereon for moving the slidable clutch member endwise; a lever pivotally connected to said rod; .a rocker shaft to which said lever is secured; an arm on said rocker shaft perpendicular to said lever; a reciprocable bar to which said arm is pivotally connected; stop members adjustable on said bar; a pivoted operating lever pivotally connected to said bar; and an arm on said non-revoluble screw in the path of said stop members and adapted to coact therewith to stop the operation of the machine at a predetermined time.

Signed by meat 746-7 Old South Bldg, Boston, Mass, this 24th day of October, 1919.

FRANCIS J. LAPOINTE. itnesses \VALTER E. LOMBARD, NATHAN C. LOMBARD. 

